Patent US4163382A successfully refreshed from Google Patents.
Patent US3229190A successfully refreshed from Google Patents.
US3229190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor chopper
Assignee: Honeywell Inc
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Filing: 1961-08-21
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Granted: 1966-01-11
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Expires: 1981-08-21
Abstract
No abstract record available.
Inventors
- 👤 Morrison John Jack
- 👤 George N Katselis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:48
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
AN ELECTRICAL MODULAR CIRCUIT COMPRISING A TRANSISTOR HAVING A D.C. INPUT APPLIED, AND AND A.C. OUTPUT TAKEN, DIRECTLY ACROSS THE EMITTER AND COLLECTOR THEREOF, AND A DRIVING SQUARE WAVE A.C. SIGNAL APPLIED TO THE BASE THEREOF, AND A SOURCE OF THE DRIVING SIGNAL CONNECTED BETWEEN SAID BASE AND A JUNCTION BETWEEN TWO RESISTIVE IMPEDANCES CONNECTED RESPECTIVELY TO SAID EMITTER AND SAID COLLECTOR, SAID RESISTANCE IMPEDANCES BEING ADJUSTED TO THAT AT ZERO D.C.
Claim 2
Dependent Claim
72 words
AN ELECTRICAL MODULAR CIRCUIT COMPRISING A TRANSISTOR HAVING A D.C. INPUT APPLIED, AND AND A.C. OUTPUT TAKEN, DIRECTLY ACROSS THE EMITTER AND COLLECTOR THEREOF, AND A DRIVING SQUARE WAVE A.C. SIGNAL APPLIED TO THE BASE THEREOF, AND A SOURCE OF THE DRIVING SIGNAL CONNECTED BETWEEN SAID BASE AND A JUNCTION BETWEEN TWO RESISTIVE IMPEDANCES CONNECTED RESPECTIVELY TO SAID EMITTER AND SAID COLLECTOR, SAID RESISTANCE IMPEDANCES BEING ADJUSTED TO THAT AT ZERO D.C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |